Unplugging the wastegate could allow the turbo to overspeed and damage it. It could also create a lot of backpressure with that small stock turbine housing. So yes, it could hurt something. That being said, I've run with it unplugged and so have alot of others. Their is a possibility for damage though so be aware.
A forum community dedicated to Diesel engine owners and enthusiasts. Come join the discussion about performance, builds, ecodiesel, towing capacity, modifications, classifieds, troubleshooting, maintenance, and more!